2' Cantilever

I would like to add a 2’ cantilever to the back of my house but I have some concerns:

1-If I simply extend the existing floor out (probably 2x12 construction) will the new wall support my roof or will I need to install beams where the existing wall is?2-Are there any problems associated with having no overhang?3-How far into the existing floor joists should my new 2x12’s extend?

2' Cantilever

for every 1ft of cantilever you have to have 2ft sistered onto the existing joist so if you want 2 ft your total board length is going to be 6ft total
is the roof already cantilever out 2ft if not you are going to lose head room. unless you do some roof work

2' Cantilever

i would put a beam where the existing wall is so that the roof doesnt have to depend on that cantilever to hold the weight depending on size o course if its a little area maybe but if its the whole side of a house no.

2' Cantilever

Quote:

Originally Posted by PSHome

for every 1ft of cantilever you have to have 2ft sistered onto the existing joist so if you want 2 ft your total board length is going to be 6ft total
is the roof already cantilever out 2ft if not you are going to lose head room. unless you do some roof work

I wouldn't use this equation,without getting someone to look at the actual home.
It doesn't sound right to me,definitely not with a weight bearing wall on it.